I have a Mecool KM2 Plus (Android TV version 11) with optical SPDIF audio output connected to a Sony Sound System with Dolby Digital/DTS decoder support. When the HDMI output is connected to my TV, 5.1 audio passthrough works fine, to HDMI as well as to SPDIF. When I select go trough SPDIF connector the SPDIF sound is only PCM stereo.
I configured the supported sound formats manually in the sound menu, but that does not help, it seems the SPDIF output only works in passthrough if the connected HDMI device supports it.
Is there support from Mecool?
So you are saying the SPDIF is not passing through Dolby Digital and DTS if the HDMI connection didn't detect those audio codecs?
I haven't tested the SPDIF port of my KM2 Plus because I have an AV receiver with HDMI inputs but I guess I could test it to confim.
You can contact Mecool over here .